BVM Super (Balsa) Bandit
Even with two shims per strap though, the straps still close all the way, as seen below.
I'm not sure why BVM didn't just make the engine straps a bit shorter - after all, there is a 1" machine screw pulling the strap closed, so a small gap would seem preferable to a situation in which you think the engine is more securely mounted than is really the case (being misled by the screw bottoming out).
I'll try to remember to ask the next time I call BVM, and pass the reasoning on.